P2420 Possible Causes
- Faulty vacuum pump module
- Vacuum pump module harness is open or shorted
- Poor electrical connection in vacuum pump module circuit
- Faulty Engine Control Module (ECM)
How to Fix Code P2420
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P2420 Symptoms
Possible
Illuminated engine light (or service engine soon warning light)
P2420 Meaning
5 hours after ignition is turned off, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The Engine Control Module (ECM) monitors leaks and actuator malfunctions based on EVAP pressure.